Moin. I know there are already x topics on this topic, but have been looking for days and find no answer. So: After the instructions here in the forum, I recoded the heater for the heater and unlocked the heater. Menu in the ZAB is available, can also set a time, but the heater does not start, also with the button at the top left of the ZAB. Is it so that the heater works only under 4 degrees, or should it always go? (tank full, battery enough voltage of course) If I drive the heater directly via VCDS, it goes. Auto is a 2008 3.0TDI with 239hp, i.e. GP1.5. I still think “frischling” at the Phaeton, have it only since April, had before 2 times A6 4f. MFG Florian